Monitor



FIG. 1 is a perspective view of the monitor showing the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a left-side view thereof.

The right-side view thereof is a mirror image. 

I claim the ornamental design for a monitor, as shown and described. 